[especially]

The mixed liquid of fat or mineral hydrocarbons contained in animals and plants is generally insoluble in water and easy to burn;

Group words: ~ cake. ~ cloth. ~ color. ~ draw. ~ bright. ~ water (also refers to abnormal gains or extra benefits). ~ circle. ~ dirt. Milk. Stone. Eat ~ Steam. Add vinegar.

2. Apply with oil or paint:

Group words: ~ brush (a. oil painting; B. Brush oil and paint).